Dependence of heat pulse propagation on transport mechanisms: Consequences of nonconstant transport coefficients
Dependence of heat pulse propagation on transport mechanisms: Consequences of nonconstant transport coefficients
复制标题
热脉冲传播对传输机制的依赖性：非恒定传输系数的后果
DOI：
10.1063/1.866790
复制
发表时间：
1988
影响因子：
4.6
通讯作者：
K. Gentle
中科院分区：
文献类型：
--
作者：
K. Gentle
粒子和热量的输运系数当然取决于等离子体参数。除了使平衡方程非线性化之外，这在线性化方程组中引入了大量的新项，这些新项可用于描述扰动对系统的影响。一个一般的一组这样的方程，其中包括最物理的依赖性的输运系数。如果输运是由密度梯度或温度梯度驱动的，正如大多数湍流理论所预期的那样，就会产生显著的定量效应。扰动不再以平衡输运速率演化，并且密度和温度扰动可以强耦合。结果提出了几个具体的情况下。
The transport coefficients for particles and heat will certainly depend upon plasma parameters. Besides making the equilibrium equations nonlinear, this introduces a multitude of new terms in the set of linearized equations, which can be used to describe the effects of perturbations to the system. A general set of such equations is obtained that includes most physical dependences of the transport coefficients. If transport is driven by gradients in density or temperature, as would be expected from most turbulence theories, significant quantitative effects result. Perturbations no longer evolve at the equilibrium transport rates, and the density and temperature perturbations can be strongly coupled. Results are presented for several specific cases.